The "hardware does not engage using automatic closers, must be manually slammed shut," wrote inspectors for the Boston Inspectional Services Department who examined the door after Walker fell to his death.

While there has been no determination that the faulty door lock led to the child's death, the license of the family day care has been suspended.

"We're canvassing the entire neighborhood, the surrounding neighborhoods for any and all potential witnesses, and we would ask that if anybody has any information -- contact the Boston Police Department," said Boston police Chief William Gross.

According to the Department of Early Education and Care, the family day care center was first licensed in 2006 to Marisol Ramos and was renewed in April 2013.

Daylan's family, who said the boy's mother has been hospitalized with grief, is demanding answers about how the fall occurred.

"No sooner do I finish talking with my daughter that (the day care provider) sends her a text message that her son is fine, quiet and playing," Lucrecia Rivera, Daylan's grandmother, said. "Fifteen minutes later she sends a photo that the child was fine. Fifteen minutes later the police call her that the boy was at the medical center."

Rivera said Daylan never had access to the stairs in the building. She said there were two doors with controlled access, and even if he did get out of the apartment, he wouldn't be able to get up there alone.

"I only ask for justice because today it happened to us, but there are lots of families out there who drop their children off at day care and go to work trusting that they are going to be well cared for, never suspecting that they would end up in a grave," she said.